Subtract 90/70 from 28/6
1st number: 4 4/6, 2nd number: 1 20/70
28/6 - 90/70 is 71/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 6 and 70 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 6 × 35 = 210,
28/6 = 28 × 35/6 × 35 = 980/210 - Likewise, for the 2nd fraction, since 70 × 3 = 210,
90/70 = 90 × 3/70 × 3 = 270/210 - Subtract the two like fractions:
980/210 - 270/210 = 980 - 270/210 = 710/210 - After reducing the fraction, the answer is 71/21
- In mixed form: 38/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/6-90/70 28/12-90/70 84/6-90/70 28/18-90/70 28/30-90/70 28/42-90/70